Climate-smart agriculture is an approach to help guide actions to transform and reorient agricultural systems to effectively and sustainably support development and food security under a changing climate. In this book, attempts have been made to present the information addressing the issues related to the impact of climate change on the crop pests and diseases. This book gives an insight on effects on climate change on crop physiological processes, changing dynamics of various groups of insect pests, their natural enemies, scenario of plant diseases and forecasting of pests and diseases based on prediction models as well as impact of climate on micro-organisms. This book will be very informative and useful for researchers, teachers and students.